Jagwire's flexible shift housing is used for the rear housing segment with Shimano Shadow-type road rear derailleurs to give optimum shifting performance and the flexibility needed for wheel installation and removal. - For use with Shimano Shadow type road rear derailleurs, such as RD-R9100, RD-R8000, and RD-R7000. - 4mm low-compression CGX-SL housing construction. - Includes 10x sealed end caps and 10x 4mm/4mm housing connectors